Aoa bro...although i have taken an attempt and my score in IHC was 138...but still i feel there are certain questions which i were not able to prepare due unavailability of relevant material...so, if you could tell me about books where from i could prepare about
1.Ottoman Empire in full detail
2.Different civilizations at the advent of Islam
3.Conquest and Muslim rule in Africa (not Fatimid)

thanking in advance.....